Increasing global trade in semen, embryos, and livestock resulted in a need for accurate comparisons of animal performance both within and across countries. However, such comparisons are made difficult by different genetic evaluation methods, breeding objectives, and management environments. In 1983, the International Bull Evaluation Service (Interbull) was established as a nonprofit organization for promoting development and standardization of international genetic evaluations of cattle. Currently, Interbull provides evaluations for bulls from more than 28 populations for milk, fat, and protein yields; 23
populations for 19 conformation traits; and 21 populations for udder health traits.
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